Airworthiness Directives; Airbus A310-221, -222, -322, -324, and -325 and A300 B4-620, B4-622, B4-622R, and F4-622R, Equipped With Pratt & Whitney PW4000 or JT9D-7R4 Series Engines. Final rule. SUMMARY: This AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as: During the year 2000, life extension exercise programs were launched for Airbus A310 and A300-600 aircraft. Certification of Extended Service Goal (ESG) is based on analysis, except for fan cowl and thrust reverser (T/R) latches, which are always certified by tests. Testing of the T/R door centre latch has shown that this does not meet the requirements for ESG. The unsafe condition is possible failure of the T/R latch and detachment of the T/R from the airplane, which could result in structural damage and consequent reduced controllability of the airplane. We are issuing this AD to require actions to correct the unsafe condition on these products. DATES: This AD becomes effective March 19, 2010.

Airworthiness Directives; Dassault-Aviation Falcon 900EX. Final rule. SUMMARY: This AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as: A quality control performed during completion of one Falcon 900EX aeroplane has shown that the crew and passenger Right-Hand (RH) oxygen lines may both interfere with the frame 8 of the aeroplane structure. A subsequent design review of the oxygen lines routing has confirmed that, on certain aeroplanes, equipped in RH mid-cabin with a 115 cu-ft oxygen cylinder, the installation of the line support assembly at frame 8 needs to be accomplished with precaution; otherwise, the oxygen lines might interfere with the structure, and this condition could lead to an oxygen leak. The unsafe condition is an oxygen leak, which would result in insufficient oxygen flow to passenger oxygen masks during a depressurization event. We are issuing this AD to require actions to correct the unsafe condition on these products. DATES: This AD becomes effective March 19, 2010.

Airworthiness Directives; PIAGGIO P-180. Final rule. SUMMARY: This AD results from mandatory continuing airworthiness information (MCAI) issued by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as: Cracks have been detected on the upper flange (cap) of several ''0'' pressure bulkheads on the production line; none of the cracks had spread across the thickness of material. Investigation revealed that all ''0'' pressure bulkheads installed on aircraft from MSN 1106 up to 1189 could have the same cracks. We are issuing this AD to require actions to correct the unsafe condition on these products. DATES: This AD becomes effective March 11, 2010.

Airworthiness Directives; EMBRAER EMB-135BJ, -135ER, -135KE, -135KL, and -135LR; and EMB-145, -145ER, -145MR, -145LR, -145XR, -145MP, and -145EP. Final rule. SUMMARY: This AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as: It has been found occurrences of main landing gear (MLG) trailing arm pins broken due to a fatigue mechanism induced by an excessive torque applied during the assemblage of auxiliary door support attachment and consequent deformation of the MLG trailing arm axle. A broken pin can lead to loss of the MLG trailing arm axle, disconnecting the trailing arm from the main strut, which affects the airplane controllability on ground. We are issuing this AD to require actions to correct the unsafe condition on these products. DATES: This AD becomes effective March 11, 2010.

Airworthiness Directives; Boeing 747-200C and -200F. Final rule. SUMMARY: This AD requires a high frequency eddy current (HFEC) inspection for cracks of certain fastener holes, and corrective action if necessary. This AD also requires repetitive replacements of the upper chords, straps (or angles), and radius fillers of certain upper deck floor beams, and, for any replacement that is done, detailed and open-hole HFEC inspections for cracks of the modified upper deck floor beams, and corrective actions if necessary. This AD results from a report from the manufacturer that the accomplishment of certain existing inspections, repairs, and modifications is not adequate to ensure the structural integrity of the affected 7075 series aluminum alloy upper deck floor beam upper chords on airplanes that have exceeded certain thresholds. We are issuing this AD to prevent cracking of the upper chords and straps (or angles) of the floor beams, which could lead to failure of the floor beams and consequent loss of controllability, rapid decompression, and loss of structural integrity of the airplane. DATES: This AD is effective March 11, 2010.